Open this, and change it to say eula=true. Not much will happen, but an EULA.txt file will be generated in the folder. Once you’ve done that, head to that folder and double click the Spigot JAR file we just downloaded. You will need to place this JAR file into a new, clean folder on your Desktop. Instead, press ‘Download’, then download the JAR file on the next page. I’m going to choose 1.12.2, don’t press the ‘Create Server’ button.
Head to the Spigot Download page, and choose your Minecraft Version. You can also choose to use Paper, but we’ll use Spigot for the sake of this tutorial. If you don’t already have a Spigot server, you’ll need to set one up.